sb/intel/ibexpeak: Implement PCH function disable in chip_ops

This does the following:
- implement a PCH disable function that will be called by the PCI
  drivers as part of their chip_ops
- removes the iobp_x calls as those don't exist on ibexpeak
- complete the devicetree with to be disabled PCI devices for the
  chip_ops to be called
- Clean up some code copied from bd82x6x

Change-Id: I78d25ffe9af482c77d397a9fdb4f0127e40baddc
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35753
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

5 files changed, 110 insertions, 29 deletions

diff --git a/src/southbridge/intel/ibexpeak/Makefile.inc b/src/southbridge/intel/ibexpeak/Makefile.inc
index 97565d6bec..9caf29fd87 100644
--- a/src/southbridge/intel/ibexpeak/Makefile.inc
+++ b/src/southbridge/intel/ibexpeak/Makefile.inc
@@ -15,7 +15,7 @@
 
 ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_IBEXPEAK),y)
 
-ramstage-y += ../bd82x6x/pch.c
+ramstage-y += pch.c
 ramstage-y += azalia.c
 ramstage-y += lpc.c
 ramstage-y += ../bd82x6x/pci.c
@@ -35,7 +35,7 @@ ramstage-y += ../bd82x6x/me_status.c
 ramstage-$(CONFIG_ELOG) += ../bd82x6x/elog.c
 ramstage-y += madt.c
 
-smm-y += smihandler.c me.c ../bd82x6x/me_8.x.c ../bd82x6x/pch.c
+smm-y += smihandler.c me.c ../bd82x6x/me_8.x.c
 
 romstage-y += early_smbus.c
 romstage-y +=../bd82x6x/early_me.c
diff --git a/src/southbridge/intel/ibexpeak/lpc.c b/src/southbridge/intel/ibexpeak/lpc.c
index 3e1f4a4350..ec9b045f24 100644
--- a/src/southbridge/intel/ibexpeak/lpc.c
+++ b/src/southbridge/intel/ibexpeak/lpc.c
@@ -409,11 +409,6 @@ static void enable_clock_gating(struct device *dev)
 	reg16 |= (1 << 2) | (1 << 11);
 	pci_write_config16(dev, GEN_PMCON_1, reg16);
 
-	pch_iobp_update(0xEB007F07, ~0UL, (1 << 31));
-	pch_iobp_update(0xEB004000, ~0UL, (1 << 7));
-	pch_iobp_update(0xEC007F07, ~0UL, (1 << 31));
-	pch_iobp_update(0xEC004000, ~0UL, (1 << 7));
-
 	reg32 = RCBA32(CG);
 	reg32 |= (1 << 31);
 	reg32 |= (1 << 29) | (1 << 28);
@@ -500,13 +495,7 @@ static void lpc_init(struct device *dev)
 	pch_power_options(dev);
 
 	/* Initialize power management */
-	switch (pch_silicon_type()) {
-	case PCH_TYPE_MOBILE5:
-		mobile5_pm_init (dev);
-		break;
-	default:
-		printk(BIOS_ERR, "Unknown Chipset: 0x%04x\n", dev->device);
-	}
+	mobile5_pm_init(dev);
 
 	/* Set the state of the GPIO lines. */
 	//gpio_init(dev);
diff --git a/src/southbridge/intel/ibexpeak/pch.c b/src/southbridge/intel/ibexpeak/pch.c
new file mode 100644
index 0000000000..9148b44a8e
--- /dev/null
+++ b/src/southbridge/intel/ibexpeak/pch.c
@@ -0,0 +1,107 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <device/pci_ops.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_def.h>
+#include "pch.h"
+
+/* Set bit in function disable register to hide this device */
+static void pch_disable_devfn(struct device *dev)
+{
+	switch (dev->path.pci.devfn) {
+	case PCI_DEVFN(22, 0): /* MEI #1 */
+		RCBA32_OR(FD2, PCH_DISABLE_MEI1);
+		break;
+	case PCI_DEVFN(22, 1): /* MEI #2 */
+		RCBA32_OR(FD2, PCH_DISABLE_MEI2);
+		break;
+	case PCI_DEVFN(22, 2): /* IDE-R */
+		RCBA32_OR(FD2, PCH_DISABLE_IDER);
+		break;
+	case PCI_DEVFN(22, 3): /* KT */
+		RCBA32_OR(FD2, PCH_DISABLE_KT);
+		break;
+	case PCI_DEVFN(25, 0): /* Gigabit Ethernet */
+		RCBA32_OR(BUC, PCH_DISABLE_GBE);
+		break;
+	case PCI_DEVFN(26, 0): /* EHCI #2 */
+		RCBA32_OR(FD, PCH_DISABLE_EHCI2);
+		break;
+	case PCI_DEVFN(27, 0): /* HD Audio Controller */
+		RCBA32_OR(FD, PCH_DISABLE_HD_AUDIO);
+		break;
+	case PCI_DEVFN(28, 0): /* PCI Express Root Port 1 */
+	case PCI_DEVFN(28, 1): /* PCI Express Root Port 2 */
+	case PCI_DEVFN(28, 2): /* PCI Express Root Port 3 */
+	case PCI_DEVFN(28, 3): /* PCI Express Root Port 4 */
+	case PCI_DEVFN(28, 4): /* PCI Express Root Port 5 */
+	case PCI_DEVFN(28, 5): /* PCI Express Root Port 6 */
+	case PCI_DEVFN(28, 6): /* PCI Express Root Port 7 */
+	case PCI_DEVFN(28, 7): /* PCI Express Root Port 8 */
+		RCBA32_OR(FD, PCH_DISABLE_PCIE(PCI_FUNC(dev->path.pci.devfn)));
+		break;
+	case PCI_DEVFN(29, 0): /* EHCI #1 */
+		RCBA32_OR(FD, PCH_DISABLE_EHCI1);
+		break;
+	case PCI_DEVFN(31, 0): /* LPC */
+		RCBA32_OR(FD, PCH_DISABLE_LPC);
+		break;
+	case PCI_DEVFN(31, 2): /* SATA #1 */
+		RCBA32_OR(FD, PCH_DISABLE_SATA1);
+		break;
+	case PCI_DEVFN(31, 3): /* SMBUS */
+		RCBA32_OR(FD, PCH_DISABLE_SMBUS);
+		break;
+	case PCI_DEVFN(31, 5): /* SATA #22 */
+		RCBA32_OR(FD, PCH_DISABLE_SATA2);
+		break;
+	case PCI_DEVFN(31, 6): /* Thermal Subsystem */
+		RCBA32_OR(FD, PCH_DISABLE_THERMAL);
+		break;
+	}
+}
+
+void pch_enable(struct device *dev)
+{
+	u32 reg32;
+
+	if (!dev->enabled) {
+		printk(BIOS_DEBUG, "%s: Disabling device\n",  dev_path(dev));
+
+		/* Ensure memory, io, and bus master are all disabled */
+		reg32 = pci_read_config32(dev, PCI_COMMAND);
+		reg32 &= ~(PCI_COMMAND_MASTER |
+			   PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
+		pci_write_config32(dev, PCI_COMMAND, reg32);
+
+		/* Disable this device if possible */
+		pch_disable_devfn(dev);
+	} else {
+		/* Enable SERR */
+		reg32 = pci_read_config32(dev, PCI_COMMAND);
+		reg32 |= PCI_COMMAND_SERR;
+		pci_write_config32(dev, PCI_COMMAND, reg32);
+	}
+}
+
+struct chip_operations southbridge_intel_ibexpeak_ops = {
+	CHIP_NAME("Intel Series 5 (Ibexpeak) Southbridge")
+	.enable_dev = pch_enable,
+};
diff --git a/src/southbridge/intel/ibexpeak/pch.h b/src/southbridge/intel/ibexpeak/pch.h
index f0e469a3ac..34f80330bc 100644
--- a/src/southbridge/intel/ibexpeak/pch.h
+++ b/src/southbridge/intel/ibexpeak/pch.h
@@ -51,9 +51,6 @@
 #ifndef __ACPI__
 #define DEBUG_PERIODIC_SMIS 0
 
-int pch_silicon_revision(void);
-int pch_silicon_type(void);
-int pch_silicon_supported(int type, int rev);
 void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue);
 void enable_smbus(void);
 void enable_usb_bar(void);
diff --git a/src/southbridge/intel/ibexpeak/sata.c b/src/southbridge/intel/ibexpeak/sata.c
index c99e944513..2d9412ad64 100644
--- a/src/southbridge/intel/ibexpeak/sata.c
+++ b/src/southbridge/intel/ibexpeak/sata.c
@@ -176,15 +176,6 @@ static void sata_init(struct device *dev)
 				     sata_port_map ^ 0x3f) << 24) | 0x183);
 	}
 
-	/* Set Gen3 Transmitter settings if needed */
-	if (config->sata_port0_gen3_tx)
-		pch_iobp_update(SATA_IOBP_SP0G3IR, 0,
-				config->sata_port0_gen3_tx);
-
-	if (config->sata_port1_gen3_tx)
-		pch_iobp_update(SATA_IOBP_SP1G3IR, 0,
-				config->sata_port1_gen3_tx);
-
 	/* Additional Programming Requirements */
 	sir_write(dev, 0x04, 0x00000000);
 	sir_write(dev, 0x28, 0x0a000033);
@@ -208,9 +199,6 @@ static void sata_init(struct device *dev)
 	sir_write(dev, 0xc4, 0x0c0c0c0c);
 	sir_write(dev, 0xc8, 0x0c0c0c0c);
 	sir_write(dev, 0xd4, 0x10000000);
-
-	pch_iobp_update(0xea004001, 0x3fffffff, 0xc0000000);
-	pch_iobp_update(0xea00408a, 0xfffffcff, 0x00000100);
 }
 
 static void sata_enable(struct device *dev)